package com.atguigu.flink.chapter05.transform;

import org.apache.flink.api.common.functions.FilterFunction;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;

/**
 * @Author lzc
 * @Date 2023/6/19 08:52
 */
public class FilterDemo {
    public static void main(String[] args) {
        Configuration conf = new Configuration();
        conf.setInteger("rest.port", 2000);
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(conf);
        env.setParallelism(1);
    
        env
            .fromElements(10, 21, 31, 41)  // etl
            .filter(new FilterFunction<Integer>() {
                @Override
                public boolean filter(Integer value) throws Exception {
                    return value % 2 == 1;
                
                }
            })
            .print();
           
        
        try {
            env.execute();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
